diff --git a/Gemfile.lock b/Gemfile.lock
index f840527..8c27963 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -16,13 +16,19 @@ GEM
     commonmarker (0.17.7.1)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
-    ethon (0.11.0)
-      ffi (>= 1.3.0)
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    ethon (0.15.0)
+      ffi (>= 1.15.0)
+    eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (0.13.1)
-      multipart-post (>= 1.2, < 3)
+    faraday (2.6.0)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.0)
     fastimage (2.1.0)
-    ffi (1.12.2)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (172)
@@ -78,20 +84,23 @@ GEM
     html-pipeline (2.7.1)
       activesupport (>= 2)
       nokogiri (>= 1.4)
+    http_parser.rb (0.8.0)
     i18n (0.9.1)
       concurrent-ruby (~> 1.0)
     img_checker (1.3)
       fastimage (~> 2.0, >= 2.0.0)
-    jekyll (3.6.3)
+    jekyll (3.8.7)
       addressable (~> 2.4)
       colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
+      jekyll-watch (~> 2.0)
       kramdown (~> 1.14)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
-      rouge (>= 1.7, < 3)
+      rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
     jekyll-avatar (0.5.0)
       jekyll (~> 3.0)
@@ -180,7 +189,7 @@ GEM
       jekyll-seo-tag (~> 2.0)
     jekyll-titles-from-headings (0.5.0)
       jekyll (~> 3.3)
-    jekyll-watch (1.5.1)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
     jemoji (0.8.1)
       activesupport (~> 4.0, >= 4.2.9)
@@ -197,31 +206,32 @@ GEM
     minima (2.1.1)
       jekyll (~> 3.3)
     minitest (5.10.3)
-    multipart-post (2.0.0)
-    net-dns (0.8.0)
+    net-dns (0.9.0)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.3.0)
-    octokit (4.7.0)
-      sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.1)
+    octokit (4.25.1)
+      faraday (>= 1, < 3)
+      sawyer (~> 0.9)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    rb-fsevent (0.10.2)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rouge (2.2.1)
     ruby-enum (0.7.1)
       i18n
+    ruby2_keywords (0.0.5)
     rubyzip (2.2.0)
-    safe_yaml (1.0.4)
-    sass (3.5.3)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sawyer (0.8.1)
-      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 1.0)
+    sawyer (0.9.2)
+      addressable (>= 2.3.5)
+      faraday (>= 0.17.3, < 3)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)